Nuclide reference
Hf-181 — Hafnium-181
Hf-181 की half-life 42.39 d है। मुख्य decay mode: β⁻ decay → Ta-181 (100%)।
Identification
- तत्व
- Hafnium (Hf)
- Atomic number Z
- 72
- Mass number A
- 181
- State
- Radioactive
Key quantities
- Half-life
- 42.39 d
- विशिष्ट गतिविधि
- 6.297e+14 Bq/g
- Gamma constant Γ
- —
- परिवहन के लिए A1 / A2 (SSR-6)
- 2 TBq / 0.5 TBq
- D-value (НП-067-24)
- 0.1 TBq
Decay modes
- β⁻ decay → Ta-181 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 482.18 | 80.5 |
| 133.021 | 43.31 |
| 57.534 · X-ray line | 15.71 |
| 345.93 | 15.12 |
| 56.279 · X-ray line | 9.013 |
| 136.26 | 5.852 |
| 136.86 | 0.8614 |
| 475.99 | 0.7028 |
| 615.17 | 0.2335 |
| 618.66 | 0.02504 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 413.98 | 93 |
| 410.18 | 7 | |
| 547 | 0.25 |
For β⁻ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0.
Related calculators
Reference data vs computed valuesHalf-life, gamma lines and D-value are reference data (ENDF/B-VIII.0, НП-067-24).Gamma constant Γ 1 m पर H*(10) है, ICRP-107 spectra (NIST µ_en/ρ, ICRP-74 Table A.21) से गणना की गई, equilibrium में short-lived progeny सहित (जैसे Cs-137/Ba-137m, Ra-226 series); specific activity molar mass M ≈ mass number A का उपयोग करती है।K-series X-ray energies are from NIST SRD 128 (Deslattes et al., 2003): in ENDF/B-VIII.0 they are given to 1 % and shifted by up to 0.7 keV for heavy elements. L-series lines and all yields are ENDF/B-VIII.0.